39. The length of a rectangle is 3cm. longer than the width. Its perimeter is 56 cm. Find its dimensions. *
A. (15,12) cm
B. (15.5, 12.5) cm
C. (14, 11) cm
D. (14.5, 11.5) cm
A. (15,12) cm
B. (15.5, 12.5) cm
C. (14, 11) cm
D. (14.5, 11.5) cm
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Answer:
B
Step-by-step explanation:
L=W+3
2L + 2W = 56
2(W+3) +2W=56
4W=50
W=12.5
L=15.5
Answer:
B. 15.5, 12.5
Step-by-step explanation:
L = x + 3
W = x
P = 56
Perimeter = 2 (L + W)
56 = 2 ((x + 3) + x)
56 = 2 (2x + 3)
56 = 4x + 6
4x = 56 - 6
4x = 50
x = 12.5
L = x + 3
= 12.5 + 3
L = 15.5